When our youth is no longer astringent, why, there will be a little heartache, a little regret, and a little pity. We have always thought that this is our youth, but in the end, whose youth does it belong to? It passed like this, and in the end I still couldn't understand the meaning of youth. What can I say? Why, when will our youth end and how will it end? Does our youth have to be so sentimental?